If you want to use them without creating a vapor barrier look for permeable iso panels faced with fiberglass.
Foil faced rigid insulation.
Working with home insulation boards insulation panels typically come in 4x8 foot sheets.
Installing rigid foam insulation.
1 in x 4 ft x 8 ft.
Seal with reinforced hvac tape sold separately.
Rigid foam insulation packs a lot of r value into a thin package but not all rigid foam performs the same.
Choose rigid insulation wisely and consider the effect its characteristics will have on the performance of the your project overall product cost and the best way to get the bang for your buck.
Smaller sizes are also available.
Roxul safe is a lightweight semi rigid stone wool insulation that provides superior fire resistance and sound control.
It is constructed from closed cell polyisocyanurate foam core bonded on each side to aluminum foil facers during the manufacturing process.
This product is designed to fill perimeter gaps between concrete floor slabs and exterior wall systems between firewalls and.
Sheets with foil facing reflect heat.
Johns manville ap foil faced foam sheathing board is rigid polyisocyanurate foam sheathing that provides exceptional heat moisture and air control to protect your building s exterior walls and when installed correctly eliminates all major thermal bridges that cause heat loss.
There s two ways you can go about with foam board insulation.
The glass fiber reinforcement contributes to improved fire performance and dimensional stability.
Johns manville r 6 common.
They re much lighter and easier to work with than plywood sheets.
This material offers the highest r values about r 6 to 6 5.
Roxul safe is ul and intertek approved as a forming material for numerous firestop systems.
The foil facing is also known as foil scrim kraft fsk.
However foil faced iso panels are warranted as impermeable.
Thermax sheathing is a non structural rigid board insulation consisting of a glass fiber infused polyisocyanurate foam core laminated between 1 0 mil smooth reflective aluminum facers on both sides.
Johns manville ap foil faced polyiso foam sheathing boards are available in r values up to r 28 and offer a reflective foil facer on one side and a non reflective facer on the other.
Products with foil facing help the panels resist moisture vapor.